Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

2229 / 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3638
  • Mfr. Part No. 1SDA071612R1
Each
MYR37,728.12
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 250A Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-9867
  • Mfr. Part No. 1SDA070697R1
Each
MYR46,968.92
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4018
  • Mfr. Part No. 3VA2110-8HL32-0AA0
Each
MYR5,037.56
Temporarily out of stock
Better World
Schneider Electric Acti9 iTG40 RCD, 40A, 1 Pole, 300mA, Type A-SI, 400V ac
  • RS Stock No. 239-9996
  • Mfr. Part No. A9Y16640
Each
MYR2,298.27
Temporarily out of stock
Siemens 24V ac Circuit Trip
  • RS Stock No. 223-7667
  • Mfr. Part No. 5TT4468-2
Each
MYR793.78
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9661
  • Mfr. Part No. 3VA11104FF420AA0
Each
MYR3,438.00
Temporarily out of stock
Siemens 315A Slotted Tag Fuse, NH3, 400V
  • RS Stock No. 230-2970
  • Mfr. Part No. 3NC3430-1U
Each (In a Pack of 3)
MYR1,883.10
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4856
  • Mfr. Part No. 3VA2580-7HK32-0AA0
Each
MYR25,406.55
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4084
  • Mfr. Part No. 3VA2116-6KQ42-0AA0
Each
MYR14,202.39
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3456
  • Mfr. Part No. 1SDA071398R1
Each
MYR52,995.40
Temporarily out of stock
RS PRO SMD Non-Resettable Surface Mount Fuse 15A, 24V
  • RS Stock No. 252-2192
Each (In a Pack of 50)
MYR1.051
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 36 kA
  • RS Stock No. 209-6998
  • Mfr. Part No. 3VA1150-4EF32-0AA0
Each
MYR1,839.83
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-3293
  • Mfr. Part No. 1SDA071202R1
Each
MYR105,843.04
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 218-1887
  • Mfr. Part No. 8GB5003-5KM
Each
MYR319.55
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4557
  • Mfr. Part No. 3VA2125-7HM36-0AA0
Each
MYR6,316.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 500A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3516
  • Mfr. Part No. 3VA1450-7FF42-0AA0
Each
MYR20,291.44
Temporarily out of stock
Mersen 40A Bolted Tag Fuse, A4C, 240 V dc, 415V ac, 94mm
  • RS Stock No. 178-1037
  • Mfr. Part No. Z1045280 / BTCP42V40/10
Each (In a Pack of 10)
MYR101.248
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3558
  • Mfr. Part No. 3VA2010-6JQ36-0AA0
Each
MYR10,511.08
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 4P 630A, Fixed Mount
  • RS Stock No. 250-4140
  • Mfr. Part No. 1SDA054410R1
Each
MYR21,069.59
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 50A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9355
  • Mfr. Part No. 3VA1150-4ED46-0AA0
Each
MYR2,450.18
1
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